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Built to resist wind and keep you warm when the chill hits, the North Face Isotherm 1/2 Zip is built for the versatile runner.  A wind resistant core helps to keep you warm on the front while FlashDry panels provide protection and warmth throughout the rest of the piece.  A double zipper provides temperature management while thumbholes at the cuffs let you keep your hands warm.  A small storage pocket at the chest provides storage for small essentials.


  • Black/Asphalt Grey (KT0)
  • Safety Green (H4D)


  • Approx. 11.5" lockdown double zipper with garage to prevent chafing
  • Reflective logo on chest and back for increased visibility in low-light settings
  • Wind resistant front panel
  • FlashDry mesh panels for protection and warmth
  • 2" mock neck
  • Storage pocket on right chest (approx. 4.5" zipper, 5"W x 7.5"H)
  • Dropped hem for additional coverage
  • Thumbholes at cuffs for added warmth


  • Main Body (100% polyester knit with FlashDry), a synthetic fabric to regulate temperature and help with moisture management
  • Panels (54% Merino Wool/46% Polyester), a lighter weight brushed fabric to increase ventilation and wick moisture

Apparel Performance Characteristics

Apparel Fit: What's this?

  • Compression
  • Fitted
  • Semi-Fitted
  • Relaxed

Temperature Range °F: What's this?

  • Cold
    • Below 30
  • Moderate
    • 30-45
    • 40-55
    • 50-65
  • Hot
    • above 65

Fabric Thickness: What's this?

  • Thin
  • Medium
  • Thick

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